Q. A metal block is exposed to beams of $X$-ray of different wavelengths $X$-rays of which wavelength penetrate most
A) $2\ \mathring{\mathrm{A}}$
B) $4\ \mathring{\mathrm{A}}$
C) $6\ \mathring{\mathrm{A}}$
D) $8\ \mathring{\mathrm{A}}$
Explanation
(a) Penetrating power is greater for lower wavelength
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.